CN102679609A - Air-cooled heat pump air conditioner - Google Patents
Air-cooled heat pump air conditioner Download PDFInfo
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- CN102679609A CN102679609A CN2012101863362A CN201210186336A CN102679609A CN 102679609 A CN102679609 A CN 102679609A CN 2012101863362 A CN2012101863362 A CN 2012101863362A CN 201210186336 A CN201210186336 A CN 201210186336A CN 102679609 A CN102679609 A CN 102679609A
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Abstract
The invention discloses an air-cooled heat pump air conditioner which comprises a compressor, an outdoor coil, a heat exchanger, a main liquid line and supercooling devices, wherein the supercooling devices comprise two or three of a supercooling coil, an economizer and a liquid-vapor separator with a supercooling function, the supercooling devices are arranged on the main liquid line, and liquid state refrigerants which circulate in the main liquid line can achieve repeatedly the supercooling through the supercooling devices. According to the air-cooled heat pump air conditioner, the performance of cooling/heating circulation of the air-cooled heat pump air conditioner is effectively improved, so that the air-cooled heat pump air conditioner is stable and reliable in operation and energy saving in a low-temperature environment.
Description
Technical field
The present invention relates to field of air conditioning, more specifically, relate to a kind of air-cooled heat pump air-conditioning, this air-conditioning especially has good heating effect under outdoor ultralow temperature operating mode.
Background technology
At present, at the northern China cold district, traditional central heating mode is main with fire coal, and this heating system still is that secure context is all less than air-cooled heat pump air-conditioning (claiming air source heat pump air-conditioner again) in energy-saving and environmental protection.The advantage of utilizing the air-cooled heat pump air-conditioning to heat is that only heat-obtaining from air does not have soot emissions, and is free from environmental pollution.Concentrating the air-cooled heat pump air-conditioning that uses is main with integral wind cooling hot pump air-conditioning unit, and it provides air conditioning water in summer for user's end, for user's end heating hot water is provided in the winter time.But; The temperature range of the running environment of common air-cooled heat-pump air-conditioner group is generally between-7 ℃ ~ 43 ℃; At the cold northern area of weather, the heat-production functions of existing air-cooled heat-pump air-conditioner group can only use at transition season basically, in case get into cold severe winter; It almost can't satisfy basic heat demand, even the air-conditioning unit can't normally start operation.The subject matter of existing air-cooled heat-pump air-conditioner group is; Under the operating mode of outdoor low temperature, the heating capacity decay is very serious, and outdoor coil pipe used frost with fixed attention and the freezing phenomenon in bottom are serious; And; Frequent defrost meeting causes heat loss and compressor band liquid, and the operation of compressor high pressure ratio brings problems such as excessive discharge temperature, thus to a great extent limit the promotion and application of air-cooled heat-pump air-conditioner group in northern market.
Therefore, be necessary to develop and a kind ofly can make it can avoid the problems referred to above that exist in the prior art in the air-cooled heat-pump air-conditioner group of reliability service in the winter of cold district.
Summary of the invention
In view of this; The objective of the invention is to overcome one or more defectives of prior art; A kind of air-cooled heat pump air-conditioning has been proposed; It can be under outdoor worst cold case reliability service and have good heating effect, thereby the instead northern China traditional be main heating system with the fire coal, to realize that environmental protection is with energy-saving and cost-reducing.
Such as here embodiment and general description, in order to realize these and other advantage and, to have proposed a kind of air-cooled heat pump air-conditioning, it is characterized in that said air-cooled heat pump air-conditioning comprises: compressor according to the object of the invention; Outdoor coil pipe used, said outdoor coil pipe used when said air-cooled heat pump air-conditioning heating operation as evaporimeter, when said air-cooled heat pump air conditioner refrigerating operation as condenser; Use the side heat exchanger, said use side heat exchanger when said air-cooled heat pump air conditioner refrigerating operation as evaporimeter, when said air-cooled heat pump air-conditioning heating operation as condenser; Main liquid line, said main liquid line are communicated with said compressor, said outdoor coil pipe used and said use side heat exchanger fluid, and liquid refrigerant circulates in said main liquid line; Supercooling apparatus; Said supercooling apparatus comprise sub-cooling coil, economizer and with in the gas-liquid separator of cold function two or three, and these supercooling apparatus are set on the said main liquid line, the liquid refrigerant that in said main liquid line, circulates can be realized repeatedly cold excessively through said supercooling apparatus; Wherein, Said sub-cooling coil is positioned at outdoor, liquid refrigerant when flowing through said sub-cooling coil and outdoor air carry out heat exchange, it is cold that liquid refrigerant was realized; Said economizer comprises the tonifying Qi liquid line that is communicated with said main liquid line fluid; Part liquid refrigerant flows into the cold-producing medium that said tonifying Qi liquid line becomes gas-liquid two-phase later on; The cold-producing medium of the gas-liquid two-phase that is produced and then carry out heat exchange with liquid refrigerant in the said main liquid line; Thus, make the liquid refrigerant in the said main liquid line realize cold; Said gas-liquid separator has and is positioned at the cold and hot exchange pipe of its inner mistake, and the gaseous refrigerant of liquid refrigerant in the inner space of the said gas-liquid separator of the said mistake of flowing through cold and hot exchange Guan Shiyu carries out heat exchange, and it is cold that liquid refrigerant was realized.
Preferably, said sub-cooling coil is arranged at said outdoor coil pipe used bottom.
Preferably; In the tonifying Qi liquid line of said economizer, be provided with tonifying Qi magnetic valve, tonifying Qi throttle mechanism and economizer heat exchange department; Said tonifying Qi magnetic valve can be opened; So that the part of the liquid refrigerant that will in said main liquid line, circulate is introduced in the said tonifying Qi liquid line; Said tonifying Qi throttle mechanism carries out throttling to the liquid refrigerant of introducing and generates the cold-producing medium of gas-liquid two-phase, the cold-producing medium of the gas-liquid two-phase that is generated so that in said economizer heat exchange department with said main liquid line in liquid refrigerant carry out heat exchange.
Preferably; On said compressor, be provided with the tonifying Qi inlet; The cold-producing medium of the gas-liquid two-phase in the tonifying Qi liquid line of said economizer generates gaseous refrigerant through after the heat exchange, and said gaseous refrigerant is introduced into said compressor via said tonifying Qi inlet, to increase the inspiratory capacity of said compressor.
Preferably; Said air-cooled heat pump air-conditioning also comprises the hydrojet cooling device; When said hydrojet cooling device surpasses setting value in the delivery temperature of said compressor, a part of liquid refrigerant in the said main liquid line is caused motor in the said compressor to cool off said motor.
Preferably; Said hydrojet cooling device comprises temperature sensor, hydrojet pipeline, hydrojet magnetic valve and hydrojet throttle mechanism; The delivery temperature of the said compressor of said temperature sensor senses; Said hydrojet magnetic valve is opened when the delivery temperature that senses surpasses setting value so that a part of liquid refrigerant in the said main liquid line is introduced said hydrojet pipeline, and said hydrojet throttle mechanism carries out throttling to the liquid refrigerant of introducing said hydrojet pipeline and generates the cold-producing medium of gas-liquid two-phase.
Preferably, said sub-cooling coil and said outdoor coil pipe used outer fin are provided with as a whole, and a shared blower fan.
Preferably, on said main liquid line, be provided with main throttle mechanism, said throttle mechanism generates the cold-producing medium of gas-liquid two-phase to carrying out throttling through repeatedly cold excessively liquid refrigerant.
Preferably, said main throttle mechanism is an electric expansion valve, and a said electric expansion valve can be worked under cooling condition or heating condition by means of the check valve assembly that is communicated with a said electric expansion valve fluid.
Preferably, said check valve assembly is welded to form by four check valves and four tee pipe fittings, and forms four interfaces.
Preferably; Said main throttle mechanism is to be composed in parallel by first throttle mechanism, second throttle mechanism and the 3rd throttle mechanism; Said first throttle mechanism is outer balanced type heating power expansion valve; Said second throttle mechanism is composed in series by magnetic valve and capillary, and said the 3rd throttle mechanism is composed in series by another magnetic valve and another capillary, and said main throttle mechanism can be worked under cooling condition or heating condition by means of the check valve assembly that is communicated with said main throttle mechanism fluid.
Preferably, said check valve assembly is welded to form by four check valves and four tee pipe fittings, and forms four interfaces.
Preferably, the method for operation of said main throttle mechanism is: when refrigerating operaton, said magnetic valve and said another magnetic valve are open mode, and said first throttle mechanism, said second throttle mechanism and said the 3rd throttle mechanism all have cold-producing medium to flow through; When heating operation and outdoor environment temperature were greater than or equal to-7 ℃, said magnetic valve was an open mode, and said another magnetic valve is a closed condition, has only said first throttle mechanism and said second throttle mechanism to have cold-producing medium to flow through; When heating operation and outdoor environment temperature were lower than-7 ℃, said magnetic valve and said another magnetic valve were closed condition, had only said first throttle mechanism to have cold-producing medium to flow through.
Preferably, said main throttle mechanism be the refrigeration electric expansion valve with heat electric expansion valve, said refrigeration electric expansion valve is communicated with said use side heat exchanger fluid, the said electric expansion valve that heats is communicated with said outdoor coil pipe used fluid.
Preferably; The method of operation of said main throttle mechanism is: when refrigerating operaton; The said electric expansion valve that heats is in full-gear, and the aperture of the valve port that said refrigeration electric expansion valve can be through regulating self is to regulate the refrigerant feed liquid amount of said use side heat exchanger; When heating operation, said refrigeration electric expansion valve is in full-gear, and the said aperture that heats the valve port that electric expansion valve can be through regulating self is to regulate said outdoor coil pipe used refrigerant feed liquid amount.
Preferably; Said main throttle mechanism is the 4th throttle mechanism and the 5th throttle mechanism; Said the 4th throttle mechanism is the refrigeration heating power expansion valve composite set parallelly connected with check valve; Said the 5th throttle mechanism is to heat heating power expansion valve, magnetic valve and series component capillaceous, these three parallelly connected composite sets of device of another check valve, and said the 4th throttle mechanism is communicated with said use side heat exchanger fluid, and said the 5th throttle mechanism is communicated with said outdoor coil pipe used fluid.
Preferably; The method of operation of said main throttle mechanism is: when heating operation; The check valve of said the 4th throttle mechanism is by forward conduction; Another check valve of said the 5th throttle mechanism is reversed and ends, and liquid refrigerant is fed to behind heating power expansion valve and the capillary-compensated said outdoor coil pipe used through heating of said the 5th throttle mechanism; When heating operation and outdoor environment temperature were greater than or equal to-7 ℃, the magnetic valve of said the 5th throttle mechanism was an open mode, said the 5th throttle mechanism heat heating power expansion valve and capillary all has cold-producing medium to flow through; When heating operation and outdoor environment temperature were lower than-7 ℃, the magnetic valve of said the 5th throttle mechanism was a closed condition, and the heating power expansion valve that heats of said the 5th throttle mechanism has cold-producing medium to flow through; When refrigerating operaton; Another check valve of said the 5th throttle mechanism is by forward conduction; The check valve of said the 4th throttle mechanism is reversed and ends, and is fed to said use side heat exchanger after the refrigeration heating power expansion valve throttling of liquid refrigerant through said the 4th throttle mechanism.
Preferably; Said main throttle mechanism is the 6th throttle mechanism and the 7th throttle mechanism; Said the 6th throttle mechanism is first capillary composite set parallelly connected with check valve; Said the 7th throttle mechanism is that second capillary, magnetic valve install parallelly connected composite sets with these three on series component, another check valve of three capillary, and said the 6th throttle mechanism is communicated with said use side heat exchanger fluid, and said the 7th throttle mechanism is communicated with said outdoor coil pipe used fluid.
Preferably, said compressor is provided with oil heater.
Beneficial effect of the present invention is that the multistage cold excessively enthalpy that increases makes the cold-producing medium degree of supercooling before the throttling greatly promote, and then the enthalpy difference between the evaporimeter import and export is increased, thereby improves refrigerating capacity and heating capacity; Economizer makes the compression function suck more cold-producing medium when worst cold case heats, and realizes accurate twin-stage compression, and heating capacity is obviously improved, and keeps again than low exhaust temperature simultaneously; Be with the gas-liquid separator of cold function to utilize space bigger in the gas-liquid separator, both realized backheating function, the return-air resistance that does not increase compressor has again effectively been avoided the band liquid of compressor and has been realized backheat, brings the raising of degree of supercooling; Sub-cooling coil has been realized the cold excessively function of liquid refrigerant, under heating condition, plays again to prevent outdoor bottom plate duct ligation frost or freezing function; The hydrojet cooling device is effectively avoided occurring in the situation of ultralow temperature operating mode lower compression machine delivery temperature superelevation when high pressure ratio moves, thereby makes unit safe and reliable operation under ultra-low temperature surroundings.
From the detailed description of the present invention below in conjunction with accompanying drawing, aforementioned and other purpose, characteristic, aspect and advantage of the present invention will become more obvious.
Description of drawings
Accompanying drawing is contained in this paper so that further understanding of the invention to be provided, and is merged in this specification, constitutes the part of this specification, and accompanying drawing shows embodiments of the invention, and is used to explain theory of the present invention with following description.
In the accompanying drawings:
Fig. 1 is the principle schematic according to first embodiment of air-cooled heat pump air-conditioning of the present invention;
Fig. 2 heats the circulation pressure-enthalpy chart according to air-cooled heat pump air-conditioning of the present invention;
Fig. 3 is the principle schematic according to second embodiment of air-cooled heat pump air-conditioning of the present invention;
Fig. 4 is the principle schematic according to the 3rd embodiment of air-cooled heat pump air-conditioning of the present invention;
Fig. 5 is the principle schematic according to the 4th embodiment of air-cooled heat pump air-conditioning of the present invention;
Fig. 6 is the principle schematic according to the 5th embodiment of air-cooled heat pump air-conditioning of the present invention.
The specific embodiment
Describe the present invention below with reference to accompanying drawings in detail.
First embodiment
Fig. 1 shows first embodiment according to air-cooled heat pump air-conditioning of the present invention; It comprises compressor 1, outdoor coil pipe used 3, use side heat exchanger 4, main liquid line and supercooling apparatus; Wherein, outdoor coil pipe used 3 are used as evaporimeter when the air-conditioning heating operation, when air conditioner refrigerating moves, be used as condenser; Use side heat exchanger 4 when air conditioner refrigerating moves, to be used as evaporimeter, when the air-conditioning heating operation, be used as condenser; Main liquid line makes compressor 1, outdoor coil pipe used 3 and use side heat exchanger 4 fluids to be communicated with, and liquid refrigerant circulates in main liquid line; Supercooling apparatus is set on the main liquid line, and the liquid refrigerant that in main liquid line, circulates can be realized repeatedly cold excessively through supercooling apparatus.
In this embodiment, supercooling apparatus comprise sub-cooling coil 7, economizer, with the gas-liquid separator 5 of cold function.Though all adopted whole three supercooling apparatus among the first embodiment of the present invention and other embodiment; But this is a preferred version; The present invention is not limited to this; Obviously, take at least two supercooling apparatus wherein can make the liquid refrigerant that in the main liquid line of air-cooled heat pump air-conditioning, circulates realize repeatedly cold excessively equally.
On the other hand; Although the annexation between each parts in the air-conditioning has been shown among Fig. 1; But these parts and annexation thereof only are exemplary, and the present invention is not limited thereto, and those skilled in the art can adjust the choice and the annexation thereof of each parts according to actual conditions.
As shown in Figure 1, the compressor 1 of air-conditioning is provided with tonifying Qi inlet V, the vortex or the screw compressor of gas supplementing opening in the middle of compressor 1 is preferably and has; Can be provided with oil heater 19 on the compressor 1; Air-conditioning cuts off the power supply for a long time and need make oil heater 19 energisings come the refrigeration oil in the preheating compressor 1 before the start again after shutting down, and when air-conditioning is in holding state, oil heater 19 is switched on; The a large amount of liquid refrigerants of dissolving in the refrigeration oil when preventing to shut down contract thereby hydraulic pressure takes place in the back of avoiding starting shooting once more.
Economizer can be connected to the tonifying Qi inlet V of compressor 1 via check valve 17; It comprises the tonifying Qi liquid line that is communicated with main liquid line; As shown in Figure 1, to the some L place of putting between the G2, be provided with the tonifying Qi liquid line that is communicated with it at the some F2 of main liquid line; In the tonifying Qi liquid line, can sequentially be provided with tonifying Qi magnetic valve 15 (closed type magnetic valve), tonifying Qi throttle mechanism 16 and economizer heat exchange department 8 (heat-exchangers of the plate type or double-pipe exchange).Tonifying Qi throttle mechanism 16 is preferably outer balanced type heating power expansion valve; The outer balance pipe that is somebody's turn to do outer balanced type heating power expansion valve is connected to the some N place on the check valve 17 tonifying Qi pipeline before; The bulb of expansion valve is close near the some N on the tonifying Qi liquid line; Outer balanced type heating power expansion valve is controlled the degree of superheat of tonifying Qi, has certain regulating action, thereby avoids mending gas carrying liquid.
Another interface J1 of reservoir 6 links to each other with the interface W1 of check valve assembly.Reservoir 6 can be two-way reservoir, that is to say two interface position symmetries of liquid storage, equal and opposite in direction.
Check valve assembly is welded to form by 11,12,13 and 14 and four tee pipe fittings of check valve, and forms four interface W1, W2, W3 and W4.The installation direction of check valve can be as shown in Figure 1, also can adjust according to actual needs.During refrigerating operaton, check valve 11 and check valve 14 are by forward conduction, and check valve 12 is reversed with check valve 13 and ends; During heating operation, check valve 12 and check valve 13 are by forward conduction, and check valve 11 is reversed with check valve 14 and ends.The interface W2 of check valve assembly links to each other with the liquid connector K2 that uses side heat exchanger 4.
Using side heat exchanger 4 can be heat-exchangers of the plate type, shell and tube heat exchanger or tube-in-tube heat exchanger; Its water side path is provided with water inlet Q2, delivery port Q1; Preferably can be provided with water inlet temperature sensor 28 and delivery port temperature sensor 26; And can also be provided with water filter 29 near the water inlet, between water inlet Q2 and delivery port Q1, be provided with differential water pressures on-off controller 27.Use the refrigerant side of side heat exchanger 4 to be provided with gas connector K1 and liquid connector K2, gas connector K1 links to each other with the interface C2 of four-way change-over valve 2.
Four-way change-over valve 2 has four connectors, is respectively interface C1, C2, C3 and C4.The interface C1 of four-way change-over valve links to each other with the exhaust outlet B of compressor 1; The interface C4 of four-way change-over valve links to each other with outdoor coil pipe used 3 gas interface H2; The interface C3 of four-way change-over valve with the gas access M2 of gas-liquid separator 5 of cold function link to each other.
Be with in the gas-liquid separator 5 of cold function and be provided with a R1 to the cold and hot exchange pipe of the mistake of putting R2; The higher liquid refrigerant of temperature carries out heat exchange at stream through the lower gaseous refrigerant of temperature in the inner space of cold and hot exchange Guan Shiyu gas-liquid separator 5; The temperature of gaseous refrigerant rises; Make the degree of superheat increase, the temperature of liquid refrigerant descends, thereby realizes the cold excessively of liquid refrigerant.Be with the gas-liquid separator 5 of cold function to be provided with interface R1 on gas access M2, gas vent M1, the liquid, liquid lower interface R2; Wherein gas vent M1 links to each other with the air entry A of compressor 1; Interface R1 links to each other with the interface G1 of economizer on the liquid; The interface G2 of economizer links to each other with the last interface F2 of sub-cooling coil 7, with the liquid lower interface R2 of gas-liquid separator 5 of cold function link to each other with the inlet of filter 10.
On main liquid line, also be provided with main throttle mechanism, main throttle mechanism is used for generating carrying out throttling through repeatedly cold excessively liquid refrigerant the cold-producing medium of gas-liquid two-phase.In first embodiment of air-cooled heat pump air-conditioning according to the present invention; Main throttle mechanism is an electric expansion valve 9; Its inlet E1 links to each other with the outlet of filter 10, and it exports E2 and links to each other with the interface W3 of check valve assembly, and the interface W4 of check valve assembly links to each other with outdoor coil pipe used 3 liquid interface H1.
Electric expansion valve 9 is controlled according to suction superheat; The air intake duct of compressor 1 is provided with suction temperature sensor 23 and pressure sensor 22; Be respectively applied for sensing suction temperature and pressure of inspiration(Pi), controller calculates the actual degree of superheat according to the suction temperature and the pressure of inspiration(Pi) that sense, and compares with the degree of superheat of setting; Carry out the PID computing to regulate and to control the valve port opening of electric expansion valve 9; Thereby suction superheat is controlled within the specific limits all the time, and for the air-conditioning system that adopts dry evaporator, the general degree of superheat scope of setting is between 4～10 ℃.
Electric expansion valve 9 adopts suction superheat control; Adjustable range is wide; Precision is high; Applicable to have constant volume and variable conpacitance compressor (as with in the middle of the vortex or the helical-lobe compressor of gas supplementing opening) air-conditioning system, can be the normal heating operation of realization under-30 ℃ the operating mode in minimum environment temperature.In addition, the air-conditioning system that capacity is bigger need be provided with reservoir 6, and nominal refrigerating capacity can not be provided with reservoir 6 less than the air-conditioning system of 30KW, and the volume of gas-liquid separator that the air-conditioning system of reservoir 6 is not set need be designed to slightly larger.
Below, come to describe respectively the closed circuit of cold-producing medium under cooling condition and heating condition with reference to Fig. 1 according in the air-cooled heat pump air-conditioning of the present invention.
When cooling condition; The interface C1 of four-way change-over valve 2 communicates with C4, C2 communicates with C3; The parts that cold-producing medium is flowed through successively are, G2 to the G1 path of the exhaust outlet B of compressor 1, C1 to the C4 path of four-way change-over valve 2, outdoor coil pipe used 3, check valve 14, reservoir 6, sub-cooling coil 7, economizer, with cold function gas-liquid separator 5 R1 to R2 path, filter 10, electric expansion valve 9, check valve 11, use side heat exchanger 4, four-way change-over valve 2 C2 to C3 path, with M2 to M1 path, the compressor air suction mouth A of gas-liquid separator 5 of cold function.
When heating condition; The interface C1 of four-way change-over valve 2 communicates with C2, C3 communicates with C4; The parts that cold-producing medium is flowed through successively are, the exhaust outlet B of compressor 1, C1 to the C2 path of four-way change-over valve 2, use side heat exchanger 4, check valve 12, reservoir 6, sub-cooling coil 7, economizer G2 to G1 path, with cold function gas-liquid separator 5 R1 to R2 path, filter 10, electric expansion valve 9, check valve 13, outdoor coil pipe used 3, four-way change-over valve 2 C4 to C3 path, with M2 to M1 path, the compressor air suction mouth A of gas-liquid separator 5 of cold function.
Hereinafter, with combining Fig. 1 that the operation principle of each supercooling apparatus further is described.
The operation principle of sub-cooling coil 7 at first, is described.When cooling condition; Outdoor coil pipe used 3 is condenser; Use side heat exchanger 4 to be evaporimeter, get into sub-cooling coils 7 through check valve 14, reservoir 6 backs from outdoor coil pipe used 3 liquid refrigerants that come out, the higher liquid refrigerant of temperature when flowing through sub-cooling coil 7 and the relatively low outdoor air of temperature carry out heat exchange; Thereby the temperature of liquid refrigerant descends, and realizes the cold excessively of liquid refrigerant.When heating condition; Use side heat exchanger 4 to be condenser; Outdoor coil pipe used 3 is evaporimeter, gets into sub-cooling coils 7 from the liquid refrigerant that uses side heat exchanger 4 to come out through check valve 12, reservoir 6 backs, the higher liquid refrigerant of temperature when flowing through sub-cooling coil 7 and the lower outdoor air of temperature carry out heat exchange; Thereby the liquid refrigerant temperature descends, and realizes the cold excessively of liquid refrigerant; At cold district, preferably sub-cooling coil 7 is arranged at outdoor coil pipe used 3 bottom, above-mentioned like this heat exchanging process just can prevent effectively that outdoor coil pipe used 3 bottom from frost taking place to coagulate and freezing phenomenon occurs.
Secondly, the operation principle of economizer is described.Air-conditioning is under the situation such as fractional load state, defrost process at start-up course, stopped status, variable conpacitance compressor, and tonifying Qi magnetic valve 15 all is in closed condition.Except that these situation, in the cooling condition when environment temperature during greater than 30 ℃, and in the heating condition when environment temperature is lower than 5 ℃, all need open tonifying Qi magnetic valve 15.After tonifying Qi magnetic valve 15 is opened; Some L place on main liquid line; Have the sub-fraction liquid refrigerant and get into the M place, entrance that the tonifying Qi liquid line arrives tonifying Qi throttle mechanism 16 through tonifying Qi magnetic valve 15, pressure descends and the temperature reduction after 16 throttlings of liquid refrigerant process tonifying Qi throttle mechanism, and the cold-producing medium that becomes gas-liquid two-phase gets into G3 to the G4 pipeline of economizer heat exchange department 8; And in economizer heat exchange department 8 with the main liquid line of G2 to G1 in liquid refrigerant carry out heat exchange; Through after the heat exchange, on the one hand, the cold-producing medium in G3 to the G4 pipeline becomes the gaseous refrigerant with certain degree of superheat; Get into compressor tonifying Qi inlet V via check valve 17 subsequently, thereby increased the inspiratory capacity of compressor; On the other hand, the temperature of the liquid refrigerant in the main liquid line of G2 to G1 descends, and has realized the cold excessively of liquid refrigerant.
At last, explain with the operation principle of gas-liquid separator 5 of cold function.Liquid refrigerant get into R1 to the R2 path of gas-liquid separator 5 of cold function; R1 to R2 path is the cold and hot exchange pipe of mistake that is positioned at gas-liquid separator 5; The higher liquid refrigerant of temperature carries out heat exchange at stream through the lower gaseous refrigerant of temperature in the inner space of cold and hot exchange Guan Shiyu gas-liquid separator, thereby the temperature of gaseous refrigerant is risen, and the degree of superheat increases; The temperature of the liquid refrigerant in the cold and hot exchange pipe was descended, realized the cold excessively of liquid refrigerant.
In air-cooled heat pump air-conditioning according to the present invention; Preferably the hydrojet cooling device can also be set; When the delivery temperature of the compressor of air-cooled heat pump air-conditioning surpassed setting value, the part of the liquid refrigerant that the hydrojet cooling device will circulate in main liquid line was guided motor (not shown) in the compressor into to cool off said motor.The hydrojet cooling device (for example comprises hydrojet pipeline, hydrojet magnetic valve 41 (closed type magnetic valve), hydrojet throttle mechanism; The hydrojet heating power expansion valve) 40 form; At the some G2 of main liquid line to the some P3 place of putting between the R1; Be provided with the hydrojet pipeline that is communicated with it; Hydrojet magnetic valve 41 all is arranged on the hydrojet pipeline with hydrojet throttle mechanism 40, and the outlet of hydrojet magnetic valve 41 links to each other with the inlet P2 of hydrojet throttle mechanism 40, and the other end of this hydrojet pipeline is communicated with the muffler of compressor 1 at a P1 place.
Next, with reference to Fig. 1 the operation principle of hydrojet cooling device is described.Temperature sensor 21 is set on the blast pipe of compressor 1; Be used for the sensing exhaust temperature data; Controller is according to the opening and closing of the delivery temperature that senses control hydrojet magnetic valve 41, when delivery temperature during greater than the early warning setting value, opens hydrojet magnetic valve 41;, a fraction of liquid refrigerant in the main liquid line arrives the inlet P2 of hydrojet throttle mechanism 40 so that being introduced the hydrojet pipeline; Liquid refrigerant through the throttling of hydrojet throttle mechanism after pressure decline temperature reduce, become the cold-producing medium of gas-liquid two-phase and get into the muffler of compressor 1 at a P1 place, arrive the interior motor side of compressor 1 with cooling motor via the air entry A of compressor 1 then; Thereby the reduction delivery temperature is then closed hydrojet magnetic valve 41 when delivery temperature is reduced to when hydrojet is set disengaging value.The hydrojet throttle mechanism is preferably the outer balanced type heating power expansion valve of high temperature modification; The outer balance pipe of this expansion valve is connected on the gas exhaust piping of compressor (promptly putting the D place), and the bulb of expansion valve is close near the some D on the gas exhaust piping, when the temperature of experiencing when bulb arrives certain value; The valve port of expansion valve just can be opened; Thereby outer balanced type heating power expansion valve can control spouting liquid, has certain regulating action, avoids the excessive compressor liquid hammer that causes of spouting liquid.
In first embodiment shown in Figure 1; Air-cooled heat pump air-conditioning according to the present invention is provided with a plurality of control sensing devices: exhaust gas temperature sensor 21, back pressure transducer 20, suction temperature sensor 23, inspiratory pressure sensor 22, water inlet temperature sensor 28, delivery port temperature sensor 26, differential water pressures on-off controller 27, outdoor environment temperature sensor 24, outdoor coil pipe used temperature sensor 25; These control sensing devices are participated in the control and the protection of air-conditioning system; Realize the effective control and the reliability service of this air-conditioning system; Wherein, The delivery temperature of exhaust gas temperature sensor 21 sensing compressors 1 is used for the control of the alarm and protection and the hydrojet magnetic valve 41 of excessive discharge temperature; Back pressure transducer 20 sensing pressures at expulsion are used for the too high alarm and protection of pressure at expulsion and participate in defrosting control; The suction temperature of suction temperature sensor 23 sensing compressors is participated in the control of electric expansion valve 9; The pressure of inspiration(Pi) of inspiratory pressure sensor 22 sensing compressors is used for control and defrosting control that pressure of inspiration(Pi) is crossed low protection and participated in electric expansion valve 9; Water inlet temperature sensor 28 sensing inflow temperatures are used to show inflow temperature and anti-frost protection; Delivery port temperature sensor 26 senses coolant-temperature gage, is used to control compressor start and stop and energy adjustment, demonstrates coolant-temperature gage and anti-frost protection; Pressure reduction between the water-in and water-out of differential water pressures on-off controller 27 sensings use side heat exchanger 4 is used to use the discharge of side heat exchanger 4 to cross low protection; The temperature of outdoor environment temperature sensor 24 sensing outdoor environments is used for the control of tonifying Qi magnetic valve 15 and participates in defrosting control; The outdoor coil pipe used temperature of outdoor coil pipe used temperature sensor 25 sensings is participated in defrosting control.
Fig. 2 be according to air-cooled heat pump air-conditioning of the present invention heat the circulation pressure-enthalpy chart, wherein, the each point that identifies among each state point of sign and Fig. 1 is corresponding.Here, brief description air-cooled heat pump air-conditioning according to the present invention heating process and the three grades of cold excessively principles that increase enthalpy under outdoor low temperature environment that see figures.1.and.2.
Gaseous refrigerant through compressor 1 boil down to HTHP gets into use side heat exchanger 4 through C1 to the C2 path of exhaust outlet B, four-way change-over valve 2 successively; In using side heat exchanger 4; Cold-producing medium is condensed into the saturated liquid refrigerant of high pressure; Condensation process release heat in heating hot water raises the hot water temperature; The saturated liquid refrigerant of high pressure gets into and is positioned at outdoor sub-cooling coil 7 through check valve 12, reservoir 6 successively after flowing out from the liquid connector K2 that uses side heat exchanger 4, and the higher saturated liquid refrigerant of high pressure of temperature carries out heat exchange with the lower surrounding air of the temperature outside the sub-cooling coil 7 when flowing through sub-cooling coil 7, makes the temperature decline of liquid refrigerant; Thereby realize the increase of liquid refrigerant degree of supercooling, this is the cold excessively enthalpy that increases of the first order.
After having the high pressure liquid refrigerant outflow sub-cooling coil 7 of certain degree of supercooling; Most of liquid refrigerant (mass flow m1) gets into G2 to the G1 path of economizer; Sub-fraction liquid refrigerant (mass flow m2) gets into the tonifying Qi liquid line also through pressure decline temperature reduction after 16 throttlings of tonifying Qi throttle mechanism through the tonifying Qi magnetic valve 15 of economizer; The cold-producing medium that becomes gas-liquid two-phase gets into G3 to the G4 pipeline of economizer heat exchange department 8; And carry out heat exchange with liquid refrigerant in the main liquid line of G2 to G1, through after the heat exchange, the cold-producing medium in G3 to the G4 pipeline becomes the gaseous refrigerant with certain degree of superheat and gets into compressor tonifying Qi inlet V via check valve 17; The temperature of the liquid refrigerant in the main liquid line of G2 to G1 continues to descend; Realized the increase once more of liquid refrigerant degree of supercooling, tonifying Qi has simultaneously increased the displacement of compressor, and this is the cold excessively enthalpy that increases in the second level.
Have the G1 outlet back of flowing out economizer heat exchange department 8 than the liquid refrigerant of big supercooling degree get into R1 to the R2 path of gas-liquid separator 5 of cold function; R1 to R2 path is the cold and hot exchange pipe of mistake that is positioned at gas-liquid separator 5; The higher liquid refrigerant lower gaseous refrigerant of temperature in the inner space of the cold and hot exchange of stream process Guan Shiyu gas-liquid separator of temperature carries out heat exchange, and the temperature of gaseous refrigerant rises, and the degree of superheat increases; The liquid refrigerant temperature of crossing in the cold and hot exchange pipe descends once more; Thereby realize the increase once more of liquid refrigerant degree of supercooling, this is the cold excessively enthalpy that increases of the third level, and this moment, liquid refrigerant had maximum subcooled temperature.
The liquid refrigerant elution band is crossed behind the Interface R2 of gas-liquid separator 5 of cold function the inlet E1 place that arrives electric expansion valves 9 through filter 10; After electric expansion valve 9 throttlings, become the cold-producing medium of the gas-liquid two-phase of low pressure, low temperature; Get into outdoor coil pipe used 3 through check valve 13; Flow through draw heat in outdoor coil pipe used 3 o'clock low temperature environment air outside coil pipe and then the evaporation of the cold-producing medium of the gas-liquid two-phase of low pressure, low temperature becomes the saturated gaseous refrigerant of low pressure, low temperature; Saturated gaseous refrigerant flow out behind outdoor coil pipe used 3 the gas interface H2 C4 to C3 path through four-way change-over valve 2 get into M2 to the M1 path of gas-liquid separator 5 of cold function; Liquid refrigerant heat exchange in saturated gaseous refrigerant in M2 to the M1 path and the cold and hot exchange pipe of the mistake of R1 to R2 path; Make saturated gaseous refrigerant become gaseous refrigerant with certain degree of superheat; The M1 interface of effluent gases liquid/gas separator 5 gets into compressor air suction mouth A then, and the gaseous refrigerant (mass flow m1) that gets into from compressor air suction mouth A mixes with the gaseous refrigerant (mass flow m2) that gets into from compressor gas supplementing opening V after through one section compression, and mixed gaseous refrigerant (mass flow m1+m2) quilt is continued to be compressed; The gaseous refrigerant that finally becomes high pressure, high temperature after compression is accomplished is discharged through exhaust outlet B, heats circulation thereby accomplish one.
Should understand; Though in this manual; The cold-producing medium that in main liquid line, circulates be through sub-cooling coil 7, economizer, with gas-liquid separator 5 whole three supercooling apparatus of cold function realize three grades cold excessively; And define these three supercooling apparatus being provided with in proper order on main liquid line, but the present invention is not limited thereto.It will be apparent to one skilled in the art that wherein any two supercooling apparatus of employing can realize goal of the invention of the present invention equally.In addition, the order of connection of each supercooling apparatus is not changeless, can adjust as required; For example; Can through with the gas-liquid separator 5 of cold function realize the cold excessively enthalpy that increases of the first order, realize the cold excessively enthalpy that increases in the second level through economizer, realize the cold excessively enthalpy that increases of the third level through sub-cooling coil 7; In the case, can adjust each supercooling apparatus be provided with order make cold-producing medium flow through successively with gas-liquid separator 5, economizer and the sub-cooling coil 7 of cold function realize three grades cold excessively.
Can find out with reference to Fig. 2; Compare with the air-conditioning of prior art; Advantage according to air-cooled heat pump air-conditioning of the present invention comprises: 1, through making three grades of cold-producing medium realizations cold excessively; The degree of supercooling of cold-producing medium before throttling greatly improved, increased cold-producing medium, the caloric receptivity of evaporimeter is greatly improved in the import of evaporimeter (outdoor coil pipe used 3) and the enthalpy difference between the outlet; 2, the economizer tonifying Qi has increased the displacement of compressor, thereby has increased the circulating mass of refrigerant of exothermic process in the condenser (using side heat exchanger 4), has realized accurate secondary compression cycle simultaneously, effectively reduces delivery temperature; 3,, thoroughly solved low temperature environment and caused the high pressure ratio operating condition can bring the problem of delivery temperature superelevation through the hydrojet cooling device is set.Because the heating capacity of air-conditioning system approximates cold-producing medium and adds the compressor wasted work through the outdoor coil pipe used heat that from surrounding air, absorbs; So air-cooled heat pump air-conditioning according to the present invention has improved heating capacity effectively; And improved the reliability of low temperature high pressure ratio operating condition, make air-conditioning system in low temperature environment, also have good heating effect and high reliability.
Second embodiment
Fig. 3 is the principle schematic according to second embodiment of air-cooled heat pump air-conditioning of the present invention.Visible from Fig. 3, be according to second embodiment of air-cooled heat pump air-conditioning of the present invention and the difference of first embodiment: in a second embodiment, replaced an electric expansion valve 9 among first embodiment with the throttle mechanism assembly of three parallel connections.The main throttle mechanism of second embodiment is composed in parallel by three throttle mechanisms: first throttle mechanism is outer balanced type heating power expansion valve, and its outer balance pipe is connected on the compressor air suction pipeline and (promptly puts the S place), and bulb is close near the some S on the suction line; Second throttle mechanism is composed in series by magnetic valve 30 and capillary 32; The 3rd throttle mechanism is composed in series with another capillary 33 by another magnetic valve 31.
More than three throttle mechanisms compose in parallel the main throttle mechanism of air-conditioning system, its method of operation is: when refrigerating operaton, magnetic valve 30, another magnetic valve 31 are open mode, and these three throttle mechanisms all have cold-producing medium to flow through; When heating operation and outdoor environment temperature were greater than or equal to-7 ℃, magnetic valve 30 was an open mode, and another magnetic valve 31 is a closed condition, and have only first and second throttle mechanisms to have cold-producing medium to flow through this moment; When heating operation and outdoor environment temperature were lower than-7 ℃, magnetic valve 30, another magnetic valve 31 were closed condition, and have only first throttle mechanism to have cold-producing medium to flow through this moment.
The main feature of second embodiment is; Electric expansion valve with respect to the conduct master throttle mechanism among first embodiment; The throttle mechanism control of second embodiment is more simple, and can come the refrigerant feed liquid amount of adjusting evaporimeter automatically according to operational mode and outdoor environment temperature.The refrigeration of the air-conditioning system of second embodiment is identical with first embodiment with flow of refrigerant direction in heating circulation, does not give unnecessary details at this.
Second embodiment also has the energy adjustment scope of broad; Applicable to the compressor with constant volume or varying capacity (as with in the middle of the vortex or the helical-lobe compressor of gas supplementing opening) air-conditioning system, can be the normal heating operation of realization under-25 ℃ the operating mode in minimum environment temperature.In addition, the air-conditioning system that capacity is bigger need be provided with reservoir 6, and nominal refrigerating capacity can not be provided with reservoir 6 less than the air-conditioning system of 30KW, and the gas-liquid separator volume that the air-conditioning system of reservoir 6 is not set need be designed to slightly larger.
The 3rd embodiment
Fig. 4 is the principle schematic according to the 3rd embodiment of air-cooled heat pump air-conditioning of the present invention.Visible from Fig. 4; The difference of the 3rd embodiment and first embodiment, second embodiment is: in the 3rd embodiment; Refrigeration and heating operation use main throttle mechanism separately respectively independently, and have saved the check valve assembly among first embodiment and second embodiment.As shown in Figure 4, when refrigerating operaton, main throttle mechanism is refrigeration electric expansion valve 91, and it is arranged between a K2 and the some R1, and as far as possible near a K2; When heating operation, main throttle mechanism adopts and heats electric expansion valve 92, and it is arranged between a H1 and the some G1, and as far as possible near a H1.
When refrigerating operaton, heat electric expansion valve 92 and be in full-gear, refrigeration electric expansion valve 91 is regulated self valve port opening to regulate the refrigerant feed liquid amount of evaporimeter (using side heat exchanger 4) according to suction superheat.When heating operation, refrigeration electric expansion valve 91 is in full-gear, heats electric expansion valve 92 and regulates self valve port opening to regulate the refrigerant feed liquid amount of evaporimeter (outdoor coil pipe used 2) according to suction superheat.
With reference to Fig. 4; The air-conditioning system of the 3rd embodiment is in refrigeration or during cycle, and the parts that cold-producing medium is flowed through successively are: the exhaust outlet B of compressor 1, C1 to the C4 path of four-way change-over valve 2, outdoor coil pipe used 3, G1 to the G2 path that heats electric expansion valve 92, economizer, sub-cooling coil 7, filter 10, with cold function gas-liquid separator 5 R2 to R1 path, refrigeration electric expansion valve 91, use side heat exchanger 4, four-way change-over valve 2 C2 to C3 path, with M2 to M1 path, the compressor air suction mouth A of gas-liquid separator 5 of cold function.
The air-conditioning system of the 3rd embodiment is heating circulation time, and the parts that cold-producing medium is flowed through successively are: the exhaust outlet B of compressor 1, C1 to the C2 path of four-way change-over valve 2, use side heat exchanger 4, refrigeration electric expansion valve 91, with cold function gas-liquid separator 5 R1 to R2 path, filter 10, sub-cooling coil 7, economizer G2 to G1 path, heat electric expansion valve 92, outdoor coil pipe used 3, four-way change-over valve 2 C4 to C3 path, with M2 to M1 path, the compressor air suction mouth A of gas-liquid separator 5 of cold function.
In the 3rd embodiment; Since kind of refrigeration cycle with heat circulation and adopt different electronic expansion valve regulation liquid supply rates respectively; And adopt suction superheat to control, so adjustable range is wide, precision is high; Applicable to have constant volume or variable conpacitance compressor (as with in the middle of the vortex or the helical-lobe compressor of gas supplementing opening) air-conditioning system, can be the normal heating operation of realization under-30 ℃ the operating mode in minimum environment temperature.In addition, the air-conditioning system that capacity is bigger can be provided with reservoir between sub-cooling coil 7 and filter 10, although do not show among Fig. 4.The name refrigerating capacity can not be provided with reservoir 6 less than the air-conditioning system of 30KW, and the volume of gas-liquid separator that the air-conditioning system of reservoir is not set need be designed to slightly larger.
The 4th embodiment
Fig. 5 is the principle schematic according to the 4th embodiment of air-cooled heat pump air-conditioning of the present invention.Visible from Fig. 5; The 4th embodiment is similar with the 3rd embodiment; But difference is: 1, in the 4th embodiment, replace the refrigeration electric expansion valve 91 among the 3rd embodiment with refrigeration heating power expansion valve 93 with check valve 36 the 4th parallelly connected throttle mechanisms, wherein; The outer balance pipe of refrigeration heating power expansion valve 93 is connected on the suction line of compressor 1 (promptly putting the S1 place), and the bulb of expansion valve is close near the some S 1 on the suction line; 2, in the 4th embodiment; With heat heating power expansion valve 94, magnetic valve 35 series component, another check valve with capillary 34 37 these three install the 5th parallelly connected throttle mechanism and replace heating electric expansion valve 92 among the 3rd embodiment; Wherein, The outer balance pipe that heats heating power expansion valve 94 is connected on the suction line of compressor 1 (promptly putting the S2 place), and the bulb of expansion valve is close near the some S2 on the suction line.
With reference to Fig. 5; When heating operation, check valve 36 is by forward conduction, via not process refrigeration thermal expansion 93 throttlings of liquid refrigerant of a K2; Directly be bypassed to some R1 through check valve 36, the refrigeration electric expansion valve 91 that is equivalent among the 3rd embodiment is in full open position; Another check valve 37 is reversed and ends, and is fed in the evaporimeter (outdoor coil pipe used 3) after heating thermal expansion 94 and capillary 34 throttlings via the liquid refrigerant of a G1.When heating operation and outdoor environment temperature were greater than or equal to-7 ℃, magnetic valve 35 was an open mode, and heat heating power expansion valve 94 this moment all has cold-producing medium to flow through with capillary 34; When heating operation and outdoor environment temperature were lower than-7 ℃, magnetic valve 35 was a closed condition, and only heat heating power expansion valve 94 this moment has cold-producing medium to flow through.
When refrigerating operaton; Another check valve 37 is by forward conduction; The liquid refrigerant of ordering via H1 does not have through heating heating power expansion valve 94 and capillary 34 throttlings; Directly be bypassed to some G1 through another check valve 37, the electric expansion valve 92 that heats that is equivalent among the 3rd embodiment is in full open position; Check valve 36 is reversed and ends, and is fed in the evaporimeter (using side heat exchanger 4) after through 93 throttlings of refrigeration heating power expansion valve via the liquid refrigerant of a R1.
The main feature of the 4th embodiment is; For the electric expansion valve throttle mechanism of the 3rd embodiment; The throttle mechanism control of the 4th embodiment is more simple, can come the refrigerant feed liquid amount of adjusting evaporimeter automatically according to operational mode and outdoor environment temperature.The kind of refrigeration cycle of the air-conditioning system of the 4th embodiment is identical with the 3rd embodiment with flow of refrigerant direction in heating circulation, does not give unnecessary details at this.
The 4th embodiment has the energy adjustment scope of broad equally; Applicable to have constant volume or variable conpacitance compressor (as with in the middle of the vortex or the helical-lobe compressor of gas supplementing opening) air-conditioning system, can be the normal heating operation of realization under-25 ℃ the operating mode in minimum environment temperature.The air-conditioning system that capacity is bigger can be provided with reservoir between sub-cooling coil 7 and filter 10, although do not show among Fig. 5.The name refrigerating capacity can not be provided with reservoir 6 less than the air-conditioning system of 30KW, and the volume of gas-liquid separator that the air-conditioning system of reservoir is not set need be designed to slightly larger.
The 5th embodiment
Fig. 6 is the principle schematic according to the 5th embodiment of air-cooled heat pump air-conditioning of the present invention.Visible from Fig. 6; The 5th embodiment is similar with the 4th embodiment; But difference is: in the 5th embodiment; With the refrigeration heating power expansion valve 93 among first capillary, 95 replacements the 4th embodiment; Replace heating heating power expansion valve 94 among the 4th embodiment with second capillary 96, other parts are identical with the parts of the 4th embodiment, thus form and the 4th embodiment in corresponding the 6th throttle mechanism of the 4th throttle mechanism and with the 4th embodiment in corresponding the 7th throttle mechanism of the 5th throttle mechanism.The kind of refrigeration cycle of the air-conditioning system of the 5th embodiment is identical with the 4th embodiment with flow of refrigerant direction in heating circulation, does not give unnecessary details at this.
According to the 5th embodiment; Preferably, the tonifying Qi heating power expansion valve 16 that can also use capillary 38 to replace among the 4th embodiment is with the hydrojet heating power expansion valve 40 among capillary 39 replacements the 4th embodiment; That is to say; Can all throttle mechanisms all be adopted mode capillaceous, in this case, energy adjustment scope and preceding four embodiment narrow; Be only applicable to have the constant volume compressor (as with in the middle of the constant speed screw compressor of gas supplementing opening) and the less air-conditioning system (nominal refrigerating capacity is less than 30KW) of capacity, can be the normal heating operation of realization under-20 ℃ the operating mode in minimum environment temperature.But for the less air-conditioning unit of capacity, this scheme can be saved the unit cost greatly, realizes the cost performance that product is optimum.
Abovely air-cooled heat pump air-conditioning according to the present invention is described in detail, but should be understood that aforesaid embodiment and advantage only are exemplary, and can not be regarded as limitation of the present invention with reference to specific embodiment.The description of this paper is intended to example, rather than the scope of restriction claim.For a person skilled in the art, multiple alternative, remodeling and modification all are conspicuous.The characteristic of exemplary embodiment described herein, structure, method and other characteristic can make up in many ways, thus that obtain other and/or interchangeable exemplary embodiment.
Claims (19)
1. an air-cooled heat pump air-conditioning is characterized in that, said air-cooled heat pump air-conditioning comprises:
Compressor;
Outdoor coil pipe used, said outdoor coil pipe used when said air-cooled heat pump air-conditioning heating operation as evaporimeter, when said air-cooled heat pump air conditioner refrigerating operation as condenser;
Use the side heat exchanger, said use side heat exchanger when said air-cooled heat pump air conditioner refrigerating operation as evaporimeter, when said air-cooled heat pump air-conditioning heating operation as condenser;
Main liquid line, said main liquid line are communicated with said compressor, said outdoor coil pipe used and said use side heat exchanger fluid, and liquid refrigerant circulates in said main liquid line;
Supercooling apparatus; Said supercooling apparatus comprise sub-cooling coil, economizer and with in the gas-liquid separator of cold function two or three; And these supercooling apparatus are set on the said main liquid line; The liquid refrigerant that in said main liquid line, circulates can be realized repeatedly cold excessively through said supercooling apparatus, wherein
Said sub-cooling coil is positioned at outdoor, liquid refrigerant when flowing through said sub-cooling coil and outdoor air carry out heat exchange, it is cold that liquid refrigerant was realized;
Said economizer comprises the tonifying Qi liquid line that is communicated with said main liquid line fluid; Part liquid refrigerant flows into the cold-producing medium that said tonifying Qi liquid line becomes gas-liquid two-phase later on; The cold-producing medium of the gas-liquid two-phase that is produced and then carry out heat exchange with liquid refrigerant in the said main liquid line; Thus, make the liquid refrigerant in the said main liquid line realize cold;
Said gas-liquid separator has and is positioned at the cold and hot exchange pipe of its inner mistake, and the gaseous refrigerant of liquid refrigerant in the inner space of the said gas-liquid separator of the said mistake of flowing through cold and hot exchange Guan Shiyu carries out heat exchange, and it is cold that liquid refrigerant was realized.
2. air-cooled heat pump air-conditioning as claimed in claim 1 is characterized in that, said sub-cooling coil is arranged at said outdoor coil pipe used bottom.
3. air-cooled heat pump air-conditioning as claimed in claim 1; It is characterized in that; In the tonifying Qi liquid line of said economizer, be provided with tonifying Qi magnetic valve, tonifying Qi throttle mechanism and economizer heat exchange department; Said tonifying Qi magnetic valve can be opened; So that the part of the liquid refrigerant that will in said main liquid line, circulate is introduced in the said tonifying Qi liquid line, said tonifying Qi throttle mechanism carries out throttling to the liquid refrigerant of introducing and generates the cold-producing medium of gas-liquid two-phase, the cold-producing medium of the gas-liquid two-phase that is generated so that in said economizer heat exchange department with said main liquid line in liquid refrigerant carry out heat exchange.
4. air-cooled heat pump air-conditioning as claimed in claim 1; It is characterized in that; On said compressor, be provided with the tonifying Qi inlet; The cold-producing medium of the gas-liquid two-phase in the tonifying Qi liquid line of said economizer generates gaseous refrigerant through after the heat exchange, and said gaseous refrigerant is introduced into said compressor via said tonifying Qi inlet, to increase the inspiratory capacity of said compressor.
5. air-cooled heat pump air-conditioning as claimed in claim 1; It is characterized in that; Said air-cooled heat pump air-conditioning also comprises the hydrojet cooling device; When said hydrojet cooling device surpasses setting value in the delivery temperature of said compressor, a part of liquid refrigerant in the said main liquid line is caused motor in the said compressor to cool off said motor.
6. air-cooled heat pump air-conditioning as claimed in claim 5; It is characterized in that; Said hydrojet cooling device comprises temperature sensor, hydrojet pipeline, hydrojet magnetic valve and hydrojet throttle mechanism; The delivery temperature of the said compressor of said temperature sensor senses; Said hydrojet magnetic valve is opened when the delivery temperature that senses surpasses setting value so that a part of liquid refrigerant in the said main liquid line is introduced said hydrojet pipeline, and said hydrojet throttle mechanism carries out throttling to the liquid refrigerant of introducing said hydrojet pipeline and generates the cold-producing medium of gas-liquid two-phase.
7. air-cooled heat pump air-conditioning as claimed in claim 2 is characterized in that, said sub-cooling coil and said outdoor coil pipe used outer fin are provided with as a whole, and a shared blower fan.
8. like each described air-cooled heat pump air-conditioning among the claim 1-7, it is characterized in that, on said main liquid line, be provided with main throttle mechanism, said throttle mechanism generates the cold-producing medium of gas-liquid two-phase to carrying out throttling through repeatedly cold excessively liquid refrigerant.
9. air-cooled heat pump air-conditioning as claimed in claim 8; It is characterized in that; Said main throttle mechanism is an electric expansion valve, and a said electric expansion valve can be worked under cooling condition or heating condition by means of the check valve assembly that is communicated with a said electric expansion valve fluid.
10. air-cooled heat pump air-conditioning as claimed in claim 9 is characterized in that, said check valve assembly is welded to form by four check valves and four tee pipe fittings, and forms four interfaces.
11. air-cooled heat pump air-conditioning as claimed in claim 8; It is characterized in that; Said main throttle mechanism is to be composed in parallel by first throttle mechanism, second throttle mechanism and the 3rd throttle mechanism; Said first throttle mechanism is outer balanced type heating power expansion valve; Said second throttle mechanism is composed in series by magnetic valve and capillary, and said the 3rd throttle mechanism is composed in series by another magnetic valve and another capillary, and said main throttle mechanism can be worked under cooling condition or heating condition by means of the check valve assembly that is communicated with said main throttle mechanism fluid.
12. air-cooled heat pump air-conditioning as claimed in claim 11 is characterized in that, said check valve assembly is welded to form by four check valves and four tee pipe fittings, and forms four interfaces.
13. air-cooled heat pump air-conditioning as claimed in claim 11; It is characterized in that; The method of operation of said main throttle mechanism is: when refrigerating operaton; Said magnetic valve and said another magnetic valve are open mode, and said first throttle mechanism, said second throttle mechanism and said the 3rd throttle mechanism all have cold-producing medium to flow through; When heating operation and outdoor environment temperature were greater than or equal to-7 ℃, said magnetic valve was an open mode, and said another magnetic valve is a closed condition, has only said first throttle mechanism and said second throttle mechanism to have cold-producing medium to flow through; When heating operation and outdoor environment temperature were lower than-7 ℃, said magnetic valve and said another magnetic valve were closed condition, had only said first throttle mechanism to have cold-producing medium to flow through.
14. air-cooled heat pump air-conditioning as claimed in claim 8; It is characterized in that; Said main throttle mechanism is the refrigeration electric expansion valve and heats electric expansion valve; Said refrigeration electric expansion valve is communicated with said use side heat exchanger fluid, and the said electric expansion valve that heats is communicated with said outdoor coil pipe used fluid.
15. air-cooled heat pump air-conditioning as claimed in claim 14; It is characterized in that; The method of operation of said main throttle mechanism is: when refrigerating operaton; The said electric expansion valve that heats is in full-gear, and the aperture of the valve port that said refrigeration electric expansion valve can be through regulating self is to regulate the refrigerant feed liquid amount of said use side heat exchanger; When heating operation, said refrigeration electric expansion valve is in full-gear, and the said aperture that heats the valve port that electric expansion valve can be through regulating self is to regulate said outdoor coil pipe used refrigerant feed liquid amount.
16. air-cooled heat pump air-conditioning as claimed in claim 8; It is characterized in that; Said main throttle mechanism is the 4th throttle mechanism and the 5th throttle mechanism; Said the 4th throttle mechanism is the refrigeration heating power expansion valve composite set parallelly connected with check valve; Said the 5th throttle mechanism is to heat heating power expansion valve, magnetic valve and series component capillaceous, these three parallelly connected composite sets of device of another check valve, and said the 4th throttle mechanism is communicated with said use side heat exchanger fluid, and said the 5th throttle mechanism is communicated with said outdoor coil pipe used fluid.
17. air-cooled heat pump air-conditioning as claimed in claim 16; It is characterized in that; The method of operation of said main throttle mechanism is: when heating operation; The check valve of said the 4th throttle mechanism is by forward conduction, and another check valve of said the 5th throttle mechanism is reversed and ends, and liquid refrigerant is fed to behind heating power expansion valve and the capillary-compensated said outdoor coil pipe used through heating of said the 5th throttle mechanism; When heating operation and outdoor environment temperature were greater than or equal to-7 ℃, the magnetic valve of said the 5th throttle mechanism was an open mode, said the 5th throttle mechanism heat heating power expansion valve and capillary all has cold-producing medium to flow through; When heating operation and outdoor environment temperature were lower than-7 ℃, the magnetic valve of said the 5th throttle mechanism was a closed condition, and the heating power expansion valve that heats of said the 5th throttle mechanism has cold-producing medium to flow through; When refrigerating operaton; Another check valve of said the 5th throttle mechanism is by forward conduction; The check valve of said the 4th throttle mechanism is reversed and ends, and is fed to said use side heat exchanger after the refrigeration heating power expansion valve throttling of liquid refrigerant through said the 4th throttle mechanism.
18. air-cooled heat pump air-conditioning as claimed in claim 8; It is characterized in that; Said main throttle mechanism is the 6th throttle mechanism and the 7th throttle mechanism; Said the 6th throttle mechanism is first capillary composite set parallelly connected with check valve; Said the 7th throttle mechanism is that second capillary, magnetic valve install parallelly connected composite sets with these three on series component, another check valve of three capillary, and said the 6th throttle mechanism is communicated with said use side heat exchanger fluid, and said the 7th throttle mechanism is communicated with said outdoor coil pipe used fluid.
19., it is characterized in that said compressor is provided with oil heater like each described air-cooled heat pump air-conditioning among the claim 1-7.
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